We are fortunate to have a copy of the composer software for the Variotram's destination display so It can be set to display anything.
We are also fortunate to have a complete original destination display unit that appears to still work. Not so easy to change what the roller blind says and it only has 30 slots.
The swing plug doors were known to get struck on the platforms if the trams were heavily loaded - the suspension is not 'self leveling' and if lot of people crushed into one of the suspended modules (with the doors) and didn't disburse along the saloon, the module would sag and the doors catch the platform.
Doors could also drag if the wheels were worn and the workshop hadn't put extra suspension spacers in to compensate for it. It's actually in the O&M manual to shim the suspension as the wheel wears to maintain the correct floor to platform height. Shim plates of varying thickness came with the tram.
Could be worse, Chemnitz had problems every winter with the swing plug doors getting stuck on snow built up on the platforms. They eventually chopped the bottom 10cm off the doors and replaced it with a rubber flap.